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A020897 as a simple table

na(n)
12
26
37
49
512
613
715
816
917
1019
1120
1222
1326
1428
1530
1631
1733
1834
1935
2037
2142
2243
2348
2449
2550
2651
2753
2854
2956
3058
3161
3262
3363
3465
3567
3668
3769
3870
3971
4072
4175
4278
4379
4484
4585
4686
4787
4889
4990
5091
5192
5294
5396
5497
5598
56103
57104
58105
59106
60107
61110
62114
63115
64117
65120

[2,6,7,9,12,13,15,16,17,19,20,22,26,28,30,31,33,
 34,35,37,42,43,48,49,50,51,53,54,56,58,61,62,63,
 65,67,68,69,70,71,72,75,78,79,84,85,86,87,89,90,
 91,92,94,96,97,98,103,104,105,106,107,110,114,115,
 117,120]